US bills printed before 1990 didn't have a lot of security features on them. You can still look for the following:
Take it to a store and spend it.... Or take it to a bank
shine a one dollar bill at the sun. then take the 2 dollar bill and put it on a black or brown flat surface and shine a uv pens light on the bill if you see the back of the bill its real if you don't its fake
You Look At The Dollar I Thje Light And check If Theres An Owl
if you are talking about just one bill it is not but if it is in hundreds thousands it is a tru million dollar
The fact that you are holding it indicates it is fake. There is no such thing as a million dollar bill and one has never been printed.
You get a marker or highlighter and put a dash on the dollar bill, if the marker changes colors its fake or fold the left side of the dollar bill about 1/4 the way in. Unfold to a 130 degree angle then slowly bring the magnets close to the 1 in the top left corner and if the dollar bill moves toward the magnets, the bill is real
you hold it up to the light and if there is a shadow of the face it's real You hold it up in the sunlight, (or any other light such as a lamp), and you look to see if there is a line that says "USA (whatever dollar bill it is such as if it where a five dollar bill, it would say "USA Five").
Two dollar bills generally are not counterfeited, so odds are it's genuine. If you're not sure, take a close look at the paper. A real bill will have tiny red and blue fibers embedded in the material.
dip it in water. if its real it will dry and you will have no problems with it. if its fake....you'll soon know.
It will have those yellow numbers on it that say 20. They will be all over.
The serial number and most times the letter on the bill.